R/E/P Community

R/E/P => Klaus Heyne's Mic Lab => Topic started by: Ron Hummel on June 30, 2016, 01:53:47 pm

Title: What brand is this mic?
Post by: Ron Hummel on June 30, 2016, 01:53:47 pm
I recently acquired this beautiful Bottle/Tube mic from a life-long collector.  I thought is was either a Neumann or Telefunken Bottle/Tube mic circa 1940's, but Klaus Heyne says it's neither.  It has very good machine work, heavy gauge stainless steel, but electronics have been removed.  I liked it just for the looks and condition, but would love to know who made it.  (2) photos attached.
Title: Re: What brand is this mic?
Post by: gtoledo3 on July 03, 2016, 02:30:18 am
It has a look that reminds me of the Telwa bottle mics, but it's also not exactly like any of them I've seen pictured... so just as good a chance it has nothing to do with that!

Still, I figured better to mention than not.
Title: Re: What brand is this mic?
Post by: klaus on July 03, 2016, 03:01:47 am
It's hard to believe that not only the amp but even the capsule has been removed from this mic. Have you had a chance to open up the head and look inside? It could give a clue.
Title: Re: What brand is this mic?
Post by: Ron Hummel on October 03, 2016, 12:22:51 am
This element is inside the top capsule.  Does that help to identify the maker?
Title: Re: What brand is this mic?
Post by: Kai on October 03, 2016, 03:25:30 am
The picture  does not show this clearly , but it looks like a dynamic.
Is there a voice coil attached to what seems to be a domed diaphragma ?
Title: Re: What brand is this mic?
Post by: Bob Eaton on October 14, 2016, 02:12:58 pm
Hard to tell for sure from the photo, but it looks like an aluminum diaphragm with a drive pin attached in the center.
That would likely make it a crystal (or ceramic) or controlled magnetic. The diaphragm looks very similar to the diaphragm on the old Astatic D104 crystal capsule (MC320). Of course those capsules have a huge resonant peak around 2500 Hz. The MC320 capsule in the D104 had a thick piece of fiberglass insulation (aircraft insulation) on the front to dampen the peak.